kernel/linux.git/drivers/firmware/efi, branch v7.1-rc5

Merge tag 'loongarch-fixes-7.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson

2026-05-23T16:13:00+00:00

Pull LoongArch fixes from Huacai Chen: "Rework KASLR to avoid initrd overlap, remove some unused code to avoid a build warning, fix some bugs in kprobes and KVM" * tag 'loongarch-fixes-7.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson: LoongArch: KVM: Move some variable declarations to paravirt.h LoongArch: kprobes: Fix handling of fatal unrecoverable recursions LoongArch: kprobes: Use larch_insn_text_copy() to patch instructions LoongArch: Remove unused code to avoid build warning LoongArch: Avoid initrd overlap during kernel relocation LoongArch: Skip relocation-time KASLR if already applied efi/loongarch: Randomize kernel preferred address for KASLR

efi/loongarch: Randomize kernel preferred address for KASLR

2026-05-21T12:58:36+00:00

Introduce efi_get_kimg_kaslr_address() helper to compute the preferred kernel image load address dynamically when CONFIG_RANDOMIZE_BASE is enabled. The function derives a random offset by using the EFI-provided randomness combined with the timer tick value, and constrains it within CONFIG_RANDOMIZE_BASE_MAX_OFFSET. Update EFI_KIMG_PREFERRED_ADDRESS to call this helper so that the EFI stub can select a randomized load address when KASLR is active, while preserving the original base address behavior when KASLR is disabled or "nokaslr" is specified. Note: LoongArch can't KASLR for hibernation, so set efi_nokaslr to true if "resume=" is explicitly specified in cmdline. Acked-by: Ard Biesheuvel Signed-off-by: WANG Rui Signed-off-by: Huacai Chen

efi: sysfb_efi: Extend quirk to cover IdeaPad Duet 3 10IGL5-LTE

2026-05-19T15:27:15+00:00

The LTE enabled version of the IdeaPad Duet 3 10IGL5 needs the same quirk as the non-LTE version. As these are the only two IdeaPad Duet 3 10IGL5 versions, we can safely use non exact matching. Tested on a IdeaPad Duet 3 10IGL5-LTE. Signed-off-by: Marius Hoch Signed-off-by: Ard Biesheuvel

efi: Allocate runtime workqueue before ACPI init

2026-05-19T15:24:00+00:00

Since commit 5894cf571e14 ("acpi/prmt: Use EFI runtime sandbox to invoke PRM handlers") ACPI PRM calls are delegated to a workqueue which runs in a kernel thread, making it easier to detect and mitigate faulting memory accesses performed by the firmware. Rafael reports that such PRM accesses may occur before efisubsys_init() executes, which is where the workqueue is allocated, leading to NULL pointer dereferences. Since acpi_init() [which triggers the early PRM accesses] executes as a subsys_initcall() as well, and has its own dependencies that may be sensitive to initcall ordering, deferring acpi_init() is not an option. So instead, split off the workqueue allocation into its own postcore initcall, as this is the only missing piece to allow EFI runtime calls to be made. This ensures that EFI runtime call (including PRM calls) are accessible to all code running at subsys_initcall() level. Cc: Fixes: 5894cf571e14 ("acpi/prmt: Use EFI runtime sandbox to invoke PRM handlers") Reviewed-by: Rafael J. Wysocki (Intel) Signed-off-by: Ard Biesheuvel

efi/libstub: Synchronize instruction cache after kernel relocation

2026-04-29T06:56:16+00:00

The relocated kernel image is copied to its new location using memcpy(). On architectures with separate instruction and data caches, the copied instructions may remain stale in the instruction cache, leading to the execution of outdated contents. Call efi_cache_sync_image() after the relocation copy to ensure the instruction cache is synchronized with the updated memory contents before control is transferred to the relocated kernel. Signed-off-by: WANG Rui Reviewed-by: Huacai Chen Signed-off-by: Ard Biesheuvel

efi/loongarch: Implement efi_cache_sync_image()

2026-04-29T06:56:16+00:00

Provide a LoongArch implementation of efi_cache_sync_image() to ensure instruction cache coherency after the kernel image is relocated. Signed-off-by: WANG Rui Reviewed-by: Huacai Chen Signed-off-by: Ard Biesheuvel

efi/libstub: Move efi_relocate_kernel() into its only remaining user

2026-04-29T06:55:58+00:00

LoongArch is the only arch that still uses efi_relocate_kernel(), so before making changes to it that LoongArch needs, turn it into a private function. Move efi_low_alloc_above() into mem.c while at it, and drop the relocate.c source file altogether. Tested-by: WANG Rui Reviewed-by: Thomas Huth Signed-off-by: Ard Biesheuvel

efi: pstore: Drop efivar lock when efi_pstore_open() returns with an error

2026-04-28T10:31:02+00:00

If kzalloc fails, the function returns -ENOMEM without calling efivar_unlock(). Since open() returned an error, the calling site in pstore_get_backend_records() won't call the close() function, so the lock is never released. Thus drop the lock in case of errors here. Fixes: 859748255b434 ("efi: pstore: Omit efivars caching EFI varstore access layer") Assisted-by: Claude:claude-opus-4-6 Signed-off-by: Thomas Huth Signed-off-by: Ard Biesheuvel

Merge tag 'loongarch-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson

2026-04-24T16:54:45+00:00

Pull LoongArch updates from Huacai Chen: - Adjust build infrastructure for 32BIT/64BIT - Add HIGHMEM (PKMAP and FIX_KMAP) support - Show and handle CPU vulnerabilites correctly - Batch the icache maintenance for jump_label - Add more atomic instructions support for BPF JIT - Add more features (e.g. fsession) support for BPF trampoline - Some bug fixes and other small changes * tag 'loongarch-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson: (21 commits) selftests/bpf: Enable CAN_USE_LOAD_ACQ_STORE_REL for LoongArch LoongArch: BPF: Add fsession support for trampolines LoongArch: BPF: Introduce emit_store_stack_imm64() helper LoongArch: BPF: Support up to 12 function arguments for trampoline LoongArch: BPF: Support small struct arguments for trampoline LoongArch: BPF: Open code and remove invoke_bpf_mod_ret() LoongArch: BPF: Support load-acquire and store-release instructions LoongArch: BPF: Support 8 and 16 bit read-modify-write instructions LoongArch: BPF: Add the default case in emit_atomic() and rename it LoongArch: Define instruction formats for AM{SWAP/ADD}.{B/H} and DBAR LoongArch: Batch the icache maintenance for jump_label LoongArch: Add flush_icache_all()/local_flush_icache_all() LoongArch: Add spectre boundry for syscall dispatch table LoongArch: Show CPU vulnerabilites correctly LoongArch: Make arch_irq_work_has_interrupt() true only if IPI HW exist LoongArch: Use get_random_canary() for stack canary init LoongArch: Improve the logging of disabling KASLR LoongArch: Align FPU register state to 32 bytes LoongArch: Handle CONFIG_32BIT in syscall_get_arch() LoongArch: Add HIGHMEM (PKMAP and FIX_KMAP) support ...

LoongArch: Adjust build infrastructure for 32BIT/64BIT

2026-04-22T07:44:26+00:00

Adjust build infrastructure (Kconfig, Makefile and ld scripts) to let us enable both 32BIT/64BIT kernel build. Reviewed-by: Arnd Bergmann Signed-off-by: Jiaxun Yang Signed-off-by: Huacai Chen